| 摘要 |
An imaging optical system is capable of arranging right and left optical systems parallel to each other while maintaining advantages of an inwardly inclined system stereoscopic microscope apparatus including right-eye and left-eye optical paths completely independent of each other, as well as a microscope apparatus including the imaging optical system. The imaging optical systems each include a plurality of lens groups and variable power optical systems. At least one lens group of the plurality of lens groups is arranged such that a center thereof deviates by a predetermined amount in a direction perpendicular to the optical axis, and a second lens group of each of the variable power optical systems is moved in a direction including a component perpendicular to a reference optical axis, in at least part of a power changing section from a high-power end state to a low-power end state.
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